Internal rearview mirror



FIG. 1 is a front elevation view of an internal rearview mirror showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side plan view thereof which is a mirror image of the opposite side thereof;

FIG. 4 is a rear elevation view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an internal rearview mirror, as shown and described. 